CrystalDiskInfo is a software that allows to know the State of the drive units of are computer. The software is portable and therefore requires no installation. It displays information about the State of health of the disk. Note that it comes with a disk manager. As a precaution, perform a regular analysis with CrystalDiskInfo to detect the presence of any unstable sectors. It supports S.M.A.R.T technology, in order to obtain temperature and other useful information.